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Algoritmos de lagrangiano aumentado para problemas de flujo no lineal

Authors: Elorza, Jorge; Ferragut, Luís; Winter, Gabriel;

Algoritmos de lagrangiano aumentado para problemas de flujo no lineal

Abstract

Al abordar la resolución de problemas no lineales mediante tecnicas de Lagrangiano aumentado es usual utilizar algoritmos del tipo "Uzawa" para el cálculo de la solución; uno de los inconvenientes de tales algontmos es la adecuada elecci6n de parámetros que aseguren una convergencia rápida. En este trabajo presentamos diversas variantes de los algoritmos antes citados que permiten un cálculo automático de los parámetros y los aplicamos al cálculo de flujo no lineal en medio poroso.

While studying'the resolution of nonlinear problems by Lagrangien augrnented methods theuzawaLike algorithms are usual to find the solution; the key point in these algorithms is the selection of an optimal value of the parameters to assure a high-speed convergence. In this woi:k we present an application of these algorithms to the nonlinear flow problem through porous media and we propose a way to select the values of the parameters mention'ed a bove.

SCIE

14

3

Keywords

Equacions, 12 Matemáticas, Àrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi matemàtica, Mètodes iteratius (Matemàtica), :Matemàtiques i estadística::Anàlisi matemàtica [Àrees temàtiques de la UPC], 1206 Análisis numérico, Numerical methods and algorithms

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
views
OpenAIRE UsageCountsViews provided by UsageCounts
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